Resume

Adrian Madrid

Staff / Senior Backend Engineer

Distributed Systems  ·  Payments  ·  Reliability  ·  Ruby on Rails

Salt Lake City, UT  •  adrian.madrid@timeworxs.com  •  801-815-1870

linkedin.com/in/aemadrid  •  timeworxs.com

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Summary

Staff-level backend engineer with 10+ years designing, shipping, and operating high-integrity distributed systems and large-scale payment pipelines. Expert in event-driven architectures, reconciliation and idempotency patterns, PostgreSQL performance, and building observable, reliable platforms. Comfortable owning architecture, writing ADRs, and leading cross-team execution.

Core competencies

Distributed Systems Event-Driven Architecture Payments & Settlement Idempotency Reconciliation PostgreSQL Ruby on Rails Kafka Amazon SQS Sidekiq AWS Kubernetes Redis Observability SLOs ADRs System Design Mentorship TDD OpenTelemetry

Experience

Acima Credit

Nov 2013 — Present

Senior / Lead Developer

  • Owned architecture and delivery for distributed payment systems handling ACH, card, virtual card, and alternative payment methods; responsible for correctness, reconciliation, and operational safety.
  • Architected event-driven services using Ruby on Rails, Kafka, SQS, Sidekiq, PostgreSQL, Redis, and AWS; designed idempotent workflows and DLQ/backfill strategies.
  • Defined reconciliation guarantees and ledger-adjacent schemas to support traceability and safe backfills.
  • Implemented structured logging, correlation IDs, distributed tracing, and SLO-driven monitoring to reduce MTTR and alert noise.
  • Authored ADRs and migration plans; led cross-team design reviews and phased rollouts to reduce business risk.
  • Mentored engineers through pairing and reviews; established shared ownership and clearer design review practices.

North Point Advisors

Sep 2010 — Aug 2013

Lead Developer

  • Led backend architecture and API redesigns across multiple applications, improved reliability and maintainability through schema and deployment changes.
  • Collaborated with stakeholders to translate business requirements into durable technical solutions.

HyperXMedia / Prefab Markets

Jun 2002 — Feb 2009

Lead Developer

  • Managed web development and Linux infrastructure; implemented deployment and monitoring practices to improve uptime.

Selected projects

Payment Pipeline Modernization

Replaced brittle batch flows with event-driven processing, introduced idempotency keys and DLQ handling, and improved operational safety for settlement and reconciliation.

Schema & Performance Redesign

Reworked PostgreSQL schemas and indexing strategies to support multi-tenant workloads and long-term scalability.

Observability & SLOs

Implemented structured logs, distributed tracing, and SLOs to reduce on-call load and accelerate incident diagnosis.

Technical skills

Ruby, Ruby on Rails, PostgreSQL, MySQL, Redis, Kafka, Amazon SQS, Sidekiq, AWS, Kubernetes, Docker, Prometheus / Grafana, OpenTelemetry, CI/CD, TDD, REST / JSON, System Design, Reliability Engineering

Education

Brigham Young University

Coursework; program not completed

Open to

Staff / Principal / Ruby on Rails Backend Engineer roles
Salt Lake City, UT  ·  Remote / Hybrid